Abstract: The voltage lost through the formation of magnetic fields and leakage and stray currents on the cover of a distributor and on the insulation of the high-voltage current conducting cables from a high-voltage coil to a distributor and from a distributor to a plurality of spark plugs of an ignition system of an internal combustion engine is at least partially regenerated by a voltage regenerator comprising inductive current trapping means for recovering the current lost through the insulation of said high-voltage current conducting cables, said current trapping means being coupled to said cables at a short distance from the current receiving ends thereof; encapsulated current collector means for receiving the current recovered by said current trapping means; at least some of said current trapping means including unidirectional current flow means permitting only the flow of current toward said collector means; current attracting means inductively coupled to said collector means; and inductive current delivery mea

Abstract: A capacitor discharge ignition circuit adapted for use with an internal combustion engine, the circuit comprising a charge capacitor, a primary ignition coil, an ignition SCR, a first spark retard circuit in series with the charge capacitor, the ignition SCR, and the primary coil and operative for selectively preventing discharge of the capacitor through the primary coil for a first predetermined period of time after the ignition SCR is rendered conductive, thereby providing for automatic spark retard at higher engine rpm, a second spark retard circuit connectable to the first spark retard circuit for further preventing discharge of the capacitor through the primary coil for a second predetermined period of time in addition to the first predetermined period of time after the ignition SCR is rendered conductive, and a switch connecting the second spark retard circuit to the first spark retard circuit when the engine is in neutral.

Abstract: An ignition system for an internal combustion engine comprises a voltage boosting means which generates a high DC voltage by boosting a low DC voltage, a capacitor which charges the high DC voltage from the voltage boosting means, and ignition coil means having a secondary winding to which the high DC voltage is applied from the boosting means, wherein a high capacitive energy charged within the capacitor is supplied into one of spark plugs located within a corresponding engine cylinder in which a spark discharge has started and subsequently the output energy from the boosting means is supplied into that spark plug via the secondary winding of the ignition coil. Consequently, the ignition energy can sufficiently be supplied immediately after an ignition start to which a combustion characteristic is closely related and the complete combustion of air-fuel mixture can be achieved over the whole range of engine revolutional speed.

Abstract: An ignition device for an internal combustion engine has a DC power source, first and second switching elements, a control signal generator for the switching elements, an ignition coil, and spark gaps. A first part of a primary coil of the ignition coil, a capacitor, the DC power source, and the first switching element form a closed circuit. A second part of the primary coil and the second switching element form another closed circuit. The signal generator generates ON signals for alternately turning on the first and second switching signals at predetermined timings based on an ignition command signal. The ignition performance of this ignition device for an internal combustion engine is improved.

Abstract: There is provided an engine ignition device which generates a high voltage in the secondary windings of the ignition coil through switching on and off of the electric current flowing in the primary windings by means of an ignition circuit. The generated high voltage is impressed on the ignition plugs to initiate ignition, and, at the same time, the high voltage is boosted by a DC-DC converter connected to the secondary windings and is supplied continuously to the ignition plugs, to prolong the discharge duration. There is further provided a DC-DC converter controlling circuit to control the DC-DC converter to initiate ignition synchronous with the ignition signal output and also to reduce the operating time of the DC-DC converter as the engine increases its speed.

Abstract: A capacitive discharge ignition system wherein the transformer secondary is responsive to changing magnetic flux such that supplemental voltage, of magnitude in excess of the spark sustaining voltage for a relatively long time period, is induced in the secondary coil in timed relation to high voltage damped oscillatory voltages induced by capacitive discharge. The magnetically induced voltage combines with the discharge induced voltage to provide at least one pulse in excess of the spark ionization potential to initiate a spark, and, in cooperation with the secondary coil inductance, thereafter sustains the spark for the duration of the time period despite the remainder of the discharge induced voltages.

Abstract: An N cylinder internal combustion engine plasma ignition system comprises a DC-DC converter for boosting low DC voltage to high DC voltage. Each of N ignition energy charging circuits includes a first capacitor connected between the DC-DC converter and ground via first and second diodes. The capacitor is charged by the DC-DC converter. Each of N reverse blocked thyristors connected to a junction of the first diode and first capacitor selectively grounds an electrode of the corresponding first capacitor to discharge ignition energy stored in the first capacitor. For each cylinder a transformer connected between the first capacitor and a spark plug boosts and feeds the discharged energy to the plug. One end of the transformer primary winding is grounded via a second capacitor to generate a damped oscillation when the corresponding thyristor grounds the first capacitor.

Abstract: An ignition device for an internal combustion engine, in which a current-supply terminal other than two end terminals of the second winding of the ignition coil is provided in the second winding or at the tertiary winding of the ignition coil: a diode is connected to the current-supplying terminal; a resistor is connected to one end of the secondary winding; the diode and the resistor are connected at one end in common; the spark gap of the combustion engine is connected between the common connection junction and the other end of the secondary winding; and the polarity of the diode is determined to be forward with respect to a discharge current flowing through the spark gap. An auxiliary power source may be provided in a network including the spark gap and the diode for increasing a discharge current of the spark gap.

Abstract: An ignition system for an internal combustion engine having a plurality of engine cylinders, wherein ignition coil and spark plug are integrally assembled into each engine cylinder so as to eliminate an ignition energy transmission loss, a DC-DC converter for boosting a low DC voltage into a high DC voltage is provided for applying the high DC voltage into each secondary winding of the ignition coils for achieving an efficient ignition of air-fuel mixture, the application of the high DC voltage being enabled according to a particular engine operating condition, e.g., engine low speed and light engine load condition, and the ignition energy being varied according to an engine operating condition by changing the pulsewidth of the ignition pulse signal to be fed into a cylinder judging circuit which judges the spark plug to be ignited and distributes the ignition pulse signal into the related circuit of the corresponding ignition coil.

Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.

Abstract: A diesel engine is started by plural ignition plugs, each installed in a swirl chamber of a corresponding cylinder. Each ignition plug includes (a) an elongated center electrode, (b) a fuel-absorbent electrical insulator that encapsulates the center electrode so as to allow only one end of the center electrode to protrude, and (c) a plurality of elongated grounding electrodes arranged symmetrically around said insulating member to define a discharge path in conjunction with the protruding end of the center electrode. The discharge path includes part of the surface of the insulating member and an air gap between free ends of the grounding electrodes and opposing surfaces of the insulating member.

Abstract: An ignition system for an internal combustion engine having a capacitive plasma jet plug including a capacitor in parallel with the series combination of an auxiliary gap and a plasma cavity. The auxiliary gap increases the required breakdown voltage before the plasma cavity generates a spark and obtains supplemental energy from the energy stored in the capacitor.

Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.

Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.

Abstract: A plasma ignition system for an internal combustion engine which varies a discharge time of a plasma ignition energy charged capacitor according to the engine operating condition, e.g., the current engine speed.

Abstract: A plasma ignition system for an engine having any number of engine cylinders, which comprises: (A) a plurality of plasma ignition plugs each mounted within a corresponding engine cylinder; (B) a first power supply unit for supplying a first electric power into each plasma ignition plug so as to generate a spark discharge within each plasma ignition plug; (C) a first switching circuit for sequentially connecting the first power supply unit to each plasma ignition plug according to a predetermined ignition order; (D) a second power supply unit for supplying a second electric power into each plasma ignition plug so as to generate a high-temperature plasma gas within each plasma ignition plug; and (E) a second switching circuit for sequentially connecting two of the plasma ignition plugs within the respective engine cylinders, one engine cylinder being at the start of an explosion stroke and the other engine cylinder being at almost end of an exhaust stroke, in a predetermined delay after the occurrence of the sp

Abstract: In an auxiliary ignition system for starting a diesel engine having a plurality of plasma spark plugs installed in corresponding combustion chambers facing fuel injection valves, starting time is reduced by applying high ignition energy to the plugs following predetermined time intervals after fuel injection to the corresponding engine cylinders.

Abstract: In order to improve the cold starting efficiency of a an internal combustion engines using alcohol or low cetane type fuel, an ignition method provides an ignition mode in which a plurality of energizations of the ignition plugs per cycle is effected during engine cold starting operation which is detected by sensing at least one of the engine temperature and the engine speed. The number of energizations per cycle is returned to one after the engine has sufficiently warmed up. The method is applied to both of a plasma ignition system and a conventional spark ignition system.

Abstract: An ignition system for a multi-cylinder internal combustion engine having a spark plug within each engine cylinder, wherein a single DC-DC converter is provided and a high-voltage withstanding characteristic capacitor is provided for each spark plug. The capacitor charges to the high DC output voltage of the DC-DC converter and operatively supplies the high DC voltage via a boosting transformer into the corresponding spark plug at a predetermined ignition timing. The amount of the discharge energy being varied according to the pulse width of an input signal of each switching circuit which operates to supply the charged high DC voltage of the capacitor into the corresponding spark plug, the pulse width being varied according to various engine operating conditions.

Abstract: A plasma ignition system for an internal combustion engine having a plasma ignition plug within each of the engine cylinders, which comprises: (a) a low DC voltage supply such as a vehicle battery; (b) a high surge voltage generator which generates and distributes a high surge voltage having a negative peak value of about minus 15 kilovolts into one of the plasma ignition plugs according to a predetermined ignition order so as to generate a spark discharge at the plasma ignition plug; (c) a DC-DC converter which boosts the low DC voltage sent from the low DC voltage supply to a high DC voltage; (d) a plurality of plasma ignition energy charging means each of which charges the high DC voltage supplied from the DC-DC converter; (e) a plurality of thyristors each for connecting the plasma ignition energy charging means to the corresponding plasma ignition energy charging means to the corresponding plasma ignition plug in response to a first trigger signal applied thereat; (f) a trigger signal generator which gen

Abstract: In an ignition system for an internal combustion engine in which the flow of a primary winding energizing current is switched on and off in synchronism with the rotation of the engine and a high voltage is induced in the secondary winding upon switching off of the energizing current, an energizing current is supplied again at around the top dead center of each cylinder and then decreased gradually and interrupted in accordance with a sawtooth waveform whose voltage attains a predetermined potential at around the top dead center and then decreases gradually.

Abstract: An engine timed ignition system of the type that combines a short duration high voltage spark with a reduced voltage DC spark sustaining signal. It includes in the system apparatus for starting the DC sustaining signal simultaneously with the high voltage spark. And, it includes apparatus to positively stop the DC sustaining signal after a predetermined interval in order to avoid a continuing spark discharge.

Abstract: A plasma ignition system having a plurality of plasma ignition plugs eliminates a mechanical distributor for sequentially distributing plasma ignition energy into each plasma ignition plug.

Abstract: In order to prevent a plasma jet energy from discharging through a spark plug of an internal combustion engine prior to the proper ignition timing, an ignition distributor with a plurality of sliding contacts is proposed. A plasma jet energy as well as a spark energy is selectively delivered to the spark plugs at a predetermined ignition timing through a plurality of contact surfaces mounted on a shaft rotatable in synchronous with the engine crankshaft, thereby an irregular discharge of the plasma jet energy is eliminated.

Abstract: An ignition energy control method and system such that a high ignition energy is supplied to the spark plugs only while the engine is operating under an unstable condition. The unstable engine operating condition is determined by detecting the difference in the maximum engine speed within a predetermined crankshaft revolution angle or by detecting the low-frequency vibration generated by the engine. The ignition energy is controlled by calculating an appropriate pulse-width of an ignition signal or by changing a high voltage generating plasma within the cylinders. The ignition energy control system according to the present invention comprises a crankshaft angle sensor or a low-frequency vibration sensor, a calculating and storing means, and an ignition system including a plasma generating power supply where necessary.

Abstract: A plasma ignition system for a multi-cylinder internal combustion engine each cylinder having a plasma ignition plug, including diesel engine. According to the present invention, in addition to the elements of the conventional plasma ignition system there is provided an oscillation device which generates and outputs a high-frequency oscillating voltage into each of the plasma ignition plugs to be ignited before the plasma ignition timing so that a multiple sparking occurs and therefore the resistance of the plasma ignition plug to be ignited is reduced to facilitate plasma ignition with relatively low plasma ignition energy without misfire even during a high engine load.

Abstract: An ignition system for an internal combustion engine includes an ignition coil system for applying a secondary generated voltage of an ignition coil and a DC high voltage to each of spark plugs and an ignition control circuit for controlling the ignition coil system. The ignition control circuit includes an ignition coil control circuit for energizing and deenergizing the ignition coil and a DC high voltage generating circuit for generating a DC high voltage. The DC high voltage generating circuit generates the DC high voltage from before the secondary generated voltage of the ignition coil causing capacitive discharge at a spark plug to a predetermined time or crank angle after the start of the discharge.

Abstract: A plasma jet ignition system with means for storing plasma ignition electric energy is disclosed wherein a switching means responsive to an ignition timing signal is connected between a charging terminal of a capacitor of the storing means. A plasma ignition electric charge stored in the capacitor is discharged when the switching means is operated in accordance with the ignition timing signal, thereby preventing an irregular discharge of the stored plasma ignition electric energy during each ignition timing interval.

Abstract: A plasma ignition system for an internal combustion engine which can prevent irregular ignition when the insulation between the electrodes of the spark plug deteriorates due to carbon on the electrodes, and further can prevent electrical noise from being emitted. The system according to the present invention comprises a plasma ignition energy storing condenser, a plurality of switching units, and boosting transformers one each for each of the engine cylinders. In this system, a high tension is generated at the secondary coil of the boosting transformer to generate a spark between the electrodes of the plug and subsequently a large current is passed through the electrodes by the remaining energy stored in the condenser.

Abstract: A plasma jet ignition system for an internal combustion engine has a plasma jet spark plug which receives ignition energy from two energy sources, one for a spark ignition and the other for a plasma jet ignition, and performs a plasma jet ignition as well as a spark ignition. There are further provided various control circuits to control the ignition energy to reduce energy consumption and to promote the functions of the plasma jet ignition. One of these circuits is arranged to stop the plasma jet ignition during a cranking period while cranking is continued after duration of a plasma jet ignition for a predetermined time period. Another control circuit is arranged to control the plasma jet ignition energy corresponding to the engine temperature.

Abstract: A plasma ignition system for an internal combustion engine which can prevent irregular ignition when the insulation between the electrodes of the spark plug deteriorates due to carbon on the electrodes, and further can prevent electrical noise from being emitted. The system according to the present invention comprises a plurality of independent plasma ignition energy storing condensers, switching units, and boosting transformers one each for each of the engine cylinder. In this system, a high tension is generated at the secondary coil of the boosting transformer to generate a spark between the electrodes of the plug and subsequently a large current is passed through the electrodes by the remaining energy stored in the condenser.

Abstract: An ignition system (51-59, 60, Ql, Qn, 30) providing high modulation energy by means of modulator (30) is used to fire an igniter and effect total fuel burning without detonation. An extremely long ignition arc is initiated at an optimum timing angle (.theta..degree.) in advance of top dead center piston position. Such long arc with its high energy content makes possible an ignited fuel nodule of increased size within the combustion chamber of the engine. The increased fuel nodule size makes possible efficient engine operation at the variety of cylinder pressures and the variety of ignition voltages usable to ignite the fuel. These long arcs may be sustained over a large range of duty cycle periods of ignition electrical power by modulation of transient current feeding the igniter.

Abstract: A photoactive ionization high-tension pulsator is provided between the distributor and the spark plug of a carburetor motor ignition system. The pulsator comprises tubular housing, electrodes disposed therein in spaced apart relationship, and a ring positioned on the inside wall of the tubular housing and being separated from the electrodes. The ring comprises a photoactive material responsive to break down between the electrodes for causing ionization of the gas, whereby to provide high-frequency current in the motor ignition system.

Abstract: Apparatus for producing spark ignition of an internal combustion engine in which sparks at the spark plugs are initiated by a high voltage pulse of typically 20 KV and are sustained thereafter by a d.c. voltage of typically 3 KV. In one embodiment the d.c. voltage is produced from a 12 volt supply by a d.c. to d.c. converter, the converter being adapted to produce a substantially constant voltage irrespective of the current drain produced by the spark, within given limits. The converter is also adapted to shut down its operation in the event of an output short circuit. The converter is disclosed connected to a lean burn PROCO engine with the result that only one spark plug per cylinder is required. In an alternative embodiment the d.c. sustaining voltage is derived directly from a conventional alternator driven by the engine.

Abstract: An ignition system for internal combustion engines employing two coordinated power sources which, together, provide a spark of much increased intensity and with extended duration. The first of the coordinated power sources is generally similar to the conventional ignition system employing an ignition coil with a primary and secondary winding, the secondary winding generating a high voltage impulse of very high voltage and low current value and of short duration. The second power source is a storage capacitor which is connected to a direct current power supply which, through a limiting resistor, charges the capacitor to a voltage which is too low to initiate a spark, but high enough to sustain an arc of a controlled high current value for increased duration, once a preliminary spark has been generated across the spark gap at the moment an energizing current in the primary winding of the ignition coil is interrupted.

Abstract: A plasma jet ignition system wherein a plasma jet energy storage system is used in conjunction with a spark energy storage system to provide energy to a plasma jet ignition plug. For the purpose of suppressing noise due to the spark discharge, a spark energy delivery cable takes the form of a high tension resistance cable and a plasma jet energy delivery cable takes the form of a lead including a coil and having a distributed inductance.

Abstract: An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by an alternating current source providing a plural number of repetition cycles during each igniter firing period. Such repetition cycles cause the capacitor and primary winding to charge and dischage during each of the repetition cycles creating a plurality of ringing periods for each igniter firing period. A diode or an additional capacitor, or both, inserted in series with the parallel combination of the first stated capacitor and primary winding, substantially increases the velocity of arc provided by an igniter. Such arc has several components composed of luminous particles extending across the entire base of the igniter. By initiating ignition timing at a very large angle in advance of top dead center piston position, very long arcs may be created at the igniter base.

Abstract: In an ignition system for an internal combustion engine, current from a d.c. power supply is applied through an input inductor alternately through an ignition coil and through a circuit path in shunt of the ignition coil. The current through the ignition coil is made of substantially constant predetermined magnitude while flowing through the shunt circuit, preferably by means of a fixed ballast resistor in the shunt circuit. Switching of the current into the ignition coil is enabled during a predetermined fraction of the engine cycle, with no current applied to the ignition coil between predetermined periods. The current is switched back and forth between the two paths a plurality of times during each predetermined period.

Abstract: A high-tension secondary current generated from an ignition coil is accumulated in a capacitor set at the head of a spark plug in a gasoline engine for automobiles, etc., and when the voltage of the discharging shaft at the end of the spark plug has built up to a predetermined value for discharge, the static electricity accumulated in the capacitor is discharged at a stroke to let out strong sparks.

Abstract: An apparatus for producing spark ignition of an internal combustion engine is disclosed including a spark generator which supplies spark generating pulses to spark plugs of the engine. The spark produced by each pulse is sustained after the pulse has died away by means of a generator which applies to the spark plugs a voltage capable of sustaining but not initiating sparks across the spark plugs. The generator is per se capable of developing a continuous output so as to maximize the spark energy and to allow the duration of the spark to be selected as desired. The output of the generator may be applied to the spark plugs continuously in which case the effect of increased impedance to the spark produced on combustion is used to terminate the spark. Alternatively, the output of the generator can be switched to terminate the spark.

Abstract: An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by an alternating current source providing a plural number of repetition cycles during each igniter firing period. Such repetition cycles cause the capacitor and primary winding to charge and discharge during each of the repetition cycles creating a plurality of ringing periods for each igniter firing period. A diode or an additional capacitor, or both, inserted in series with the parallel combination of the first stated capacitor and primary winding, substantially increases the velocity of arc provided by an igniter. Such arc has several components composed of luminous particles extending across the entire base of the igniter.

Abstract: An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by an alternating current source providing a plural number of repetition cycles during each igniter firing period. Such repetition cycles cause the capacitor and primary winding to charge and discharge during each of the repetition cycles creating a plurality of ringing periods for each igniter firing period. A diode or an additional capacitor, or both, inserted in series with the parallel combination of the first stated capacitor and primary winding, substantially increases the velocity of arc provided by an igniter. Such arc has several components composed of luminous particles extending across the entire base of the igniter.

Abstract: An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by a unipolar alternating current source providing a plural number of repetition cycles during each igniter firing period. Such unipolar cycles cause the capacitor and primary winding to charge and discharge during each of the repetition cycles creating a plurality of ringing periods for each igniter firing period. A diode or an additional capacitor, or both, inserted in series with the parallel combination of the first stated capacitor and primary winding, substantially increases the velocity of arc provided by an igniter. The system is triggered by a magnetic pulse generating timer which generates AC voltages to modulate the output of the unipolar source. Where discharge currents are developed, such generated AC voltages also modulate the discharge currents.

Abstract: An ignition system uses a transformer with a primary winding and a secondary winding wherein the secondary winding is intermittently coupled to at least one igniter load. An electronic switch is connected to the primary winding. Such electronic switch has an input circuit and an output circuit for enabling electrical energy to be stored in the primary winding. The electronic switch may have an additional switching stage feeding its input circuit for establishing the charging period of the primary winding consistent with the logic of a conventional ignition system. A timer is electrically coupled to the additional switching stage for intermittently activating such electronic switch. An alternating current modulator is connected to the primary winding so as to provide a modulating signal during the discharge period of the system thereby modulating the discharge current of the primary winding.

Abstract: An expolsion chamber including a principle which allows a method of exploding various fuel vapors other than gasoline. High electrical energy input to the system is maximized as less combustible vapors are exploded.The two unique features of the system are: 1. The timing is automatically set by standard ignition control which triggers the high energy exploding sequence. 2. Both the ignition injection and the high energy discharge are fed into the exploding chamber with the same electrode. This is possible through the utilization of a high voltage, high current diode stack. The stack is constructed, for example, of 288 diodes. The total peak inverse voltage (PIV) is about 24 kilovolts for ignition preservation and the current discharge surge is about 600 amperes. In the multiple chamber engine, one diode stack is required for each chamber. In the four chamber engine about 1,152 diodes are utilized. High power rheostats are placed in series with the stacks to control the dwell time of the electrical discharge.

Abstract: A device for improving the ignition characteristic of an internal combustion engine and reducing the air pollutants discharged by such engine having electrical apparatus for applying an electrostatic charge into the combustion chambers of the engine including a pair of electrical energy conductors, and an induction block connected with the conductors for each of the spark plug wires of the engine each induction block having a longitudinal channel sized to receive a spark plug wire, a retainer for holding the block on the spark plug wire, first and second longitudinally spaced chambers partially encircling the spark plug wire channel in electrical insulated relationship from the channel, first and second electrically conductive plates positioned in the first and second chambers partially encircling the spark plug wire channel, conductive clamping means on each of the plates connecting each plate with one of the pair of conductors between the induction blocks, and removable cover means for holding the pair of e

Abstract: An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary winding and in the output circuit of the power source. Such electronic switch is made operable by virtue of the peak excursions of the alternating current thus supplying the necessary collector or emitter potential, depending upon the manner in which the electronic switch is connected, for the entire igniter firing cycle. A capacitor in series with the output circuit of the power source and with the primary winding enables current to be transferred out of the power source to such primary winding. Such electronic switch also provides discrete separation between successive output waveforms of successive ignition firing cycles. The system employs a temporary change accumulator inductor in the output circuit in series with the primary winding.